Thermodynamics, Thermal Radiation and the Beginnings of Modern Physics
The beginnings of Quantum Physics is introduced in such a manner as to present a continuity of effort between "classical" and "quantum" physics. This paper was written in 1981 and looks at the specific problem of the energy spectrum of a black body source in thermal equilibrium, the 1900 discoveries by Max Planck, and the transfer of energy at an atomic scale.
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Max Planck never believed that his 1900 paper was all that revolutionary. If one were to look for a comparable achievement it would be Stefan reviewing the Petit-Dulong data and arriving at his T to the fourth power law, the Stefan-Boltzmann Law which would later be explained using Planck's black body energy spectrum.